Following are a number of back-translations as well as a sample translation for translators of Proverbs 15:32:

• Kupsabiny: “A person who does not want to be corrected, does not want life for himself,
  and the one who loves/accepts to be advised, gets understanding/wisdom.” (Source: Kupsabiny Back Translation)
• Newari: “Those who have no concern for discipline
  destroy themselves.
  A person who corrects his mistake is wise.” (Source: Newari Back Translation)
• Hiligaynon: “A man despises himself if he does- not -pay-attention to the rebuking of him to straighten his behavior, but if he listens, he can-possess/gain/obtain understanding.” (Source: Hiligaynon Back Translation)
• Kankanaey: “The one who cannot-be-taught, he hardships himself, but one who listens to advice, he becomes-wise/intelligent.” (Source: Kankanaey Back Translation)
• English: “If people refuse to listen when others try to correct them, they are despising/hurting themselves;
  those who pay attention/heed when others warn them become wiser/acquire good sense.” (Source: Translation for Translators)